217134906 has 8 divisors (see below), whose sum is σ = 434269824. Its totient is φ = 72378300.

The previous prime is 217134901. The next prime is 217134941. The reversal of 217134906 is 609431712.

It is a sphenic number, since it is the product of 3 distinct primes.

217134906 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (217134901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18094570 + ... + 18094581.

It is an arithmetic number, because the mean of its divisors is an integer number (54283728).

Almost surely, 2^217134906 is an apocalyptic number.

217134906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217134906 is a wasteful number, since it uses less digits than its factorization.

217134906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36189156.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 217134906 is about 14735.4981592072. The cubic root of 217134906 is about 601.0490038051.

The spelling of 217134906 in words is "two hundred seventeen million, one hundred thirty-four thousand, nine hundred six".